LF R4KK P4K class mod for FL4K?

Hi, I am looking for the legendary mod R4KK P4K for FL4K. I have what looks to be a pretty good siren rifle to trade:
581 item score
corrosive double-penetrating laser sploder
annoited siren
after phase cast weapon damage +250% for short time

I also have several other 521 legendary class mods to trade if wanted (I don’t know why the game keeps making Amara mods drop for me).